This Duracell Multi-charger is suitable for charging AA, AAA, C, D and 9v rechargeable NiMH batteries. The charger has a LED indicator that lights up red for charging and green to shows that charging is complete. The unit is able to charge 4 batteries at once (4 x AA or AAA, 4 x C or D, 1 x 9V) and can charge 4 AA batteries in just 3 hours.